{"id":29281,"date":"2019-08-05T11:30:39","date_gmt":"2019-08-05T02:30:39","guid":{"rendered":"https:\/\/www.creationline.com\/?p=29281"},"modified":"2019-09-11T18:00:46","modified_gmt":"2019-09-11T09:00:46","slug":"kubernetes-%e3%83%ad%e3%82%b0%e3%83%9e%e3%82%a6%e3%83%b3%e3%83%88%e3%81%ae%e3%83%aa%e3%82%b9%e3%82%af-aquasecurity-devsecops-container-security-kubernetes","status":"publish","type":"post","link":"https:\/\/www.creationline.com\/tech-blog\/cloudnative\/aquasecurity\/29281","title":{"rendered":"Kubernetes \u30ed\u30b0\u30de\u30a6\u30f3\u30c8\u306e\u30ea\u30b9\u30af #AquaSecurity #DevSecOps #Container #Security #Kubernetes"},"content":{"rendered":"<p>\u672c\u30d6\u30ed\u30b0\u306f\u300cAqua Security\u300d\u793e\u306e\u6280\u8853\u30d6\u30ed\u30b0\u30672019\u5e748\u67081\u65e5\u306b\u516c\u958b\u3055\u308c\u305f\u300c<a href=\"https:\/\/blog.aquasec.com\/kubernetes-security-pod-escape-log-mounts\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">Kubernetes Pod Escape Using Log Mounts<\/a>\u300d\u306e\u65e5\u672c\u8a9e\u7ffb\u8a33\u3067\u3059\u3002<\/p>\n<div style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/blog.aquasec.com\/hs-fs\/hubfs\/Blog\/08-01%20-%20Kubernetes%20Escape\/Kubernetes%20Pod%20Escape.jpg?width=975&name=Kubernetes%20Pod%20Escape.jpg\" \n width=\"1910\" height=\"365\" alt=\"\" \/><\/div>\n<h2>\u30ed\u30b0\u30de\u30a6\u30f3\u30c8\u3092\u4f7f\u7528\u3057\u305f\u4fb5\u5165<\/h2>\n<p>Kubernetes\u306b\u306f\u591a\u304f\u306e\u69cb\u6210\u3067\u3067\u304d\u3066\u304a\u308a\u3001\u305d\u308c\u3089\u3092\u7279\u5b9a\u306e\u65b9\u6cd5\u3067\u7d44\u307f\u5408\u308f\u305b\u308b\u3068\u4e88\u671f\u3057\u306a\u3044\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30ea\u30b9\u30af\u304c\u751f\u3058\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001root\u3068\u3057\u3066\u5b9f\u884c\u3055\u308c\u3001\u30ce\u30fc\u30c9\u4e0a\u306e<i>\/var\/log<\/i>\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3078\u306e\u30de\u30a6\u30f3\u30c8\u30dd\u30a4\u30f3\u30c8\u3092\u4f7f\u7528\u3057\u3066\u5b9f\u884c\u3055\u308c\u3066\u3044\u308bpod\u304c\u3001\u30ed\u30b0\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u3059\u3079\u3066\u306e\u30e6\u30fc\u30b6\u306b\u30db\u30b9\u30c8\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u306e\u5185\u5bb9\u5168\u4f53\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u65b9\u6cd5\u3092\u8aac\u660e\u3057\u307e\u3059\u3002\u30af\u30e9\u30b9\u30bf\u3067\u3053\u306e\u554f\u984c\u3092\u8efd\u6e1b\u3059\u308b\u305f\u3081\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u306b\u3064\u3044\u3066\u3082\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n<h3>Kubernetes\u306f\u3069\u306e\u3088\u3046\u306b\u30ed\u30b0\u3092\u898b\u308b\u304b<\/h3>\n<p><span style=\"background-color:#f5f5f5\">kubectl logs &lt; pod_name &gt;<\/span>\u3067pod\u304b\u3089\u30ed\u30b0\u3092\u53d6\u5f97\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u7591\u554f\u306b\u601d\u3063\u305f\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u304b\uff1f\u8ab0\u304c\u30b3\u30f3\u30c6\u30ca\u304b\u3089\u30ed\u30b0\u3092\u53d6\u5f97\u3059\u308b\u8cac\u4efb\u304c\u3042\u308b\u306e\u3067\u3057\u3087\u3046\u304b\uff1f\u53d6\u5f97\u3057\u305f\u30ed\u30b0\u306f\u3069\u306e\u3088\u3046\u306b\u3042\u306a\u305f\u306e\u30de\u30b7\u30f3\u306b\u5c4a\u304f\u306e\u3067\u3057\u3087\u3046\u304b\uff1f<\/p>\n<p>\u4ee5\u4e0b\u306f\u30a4\u30e1\u30fc\u30b8\u56f3\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/cdn2.hubspot.net\/hubfs\/1665891\/Blog\/08-01%20-%20Kubernetes%20Escape\/kubelet-vulnerabilty_OK.jpg\" alt=\"\" \/><\/p>\n<p>kubelet\u306f\u3001pod\u304c\u52d5\u3044\u3066\u3044\u308b\u30ce\u30fc\u30c9\u4e0a\u306e<i>\/var\/log<\/i>\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u5185\u306b\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u69cb\u9020\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002pod\u306e\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u5185\u306b0.log\u30d5\u30a1\u30a4\u30eb<span style=\"color:#0000ff\">(1)<\/span> \u304c\u3042\u308a\u307e\u3059\u304c\u3001\u3053\u308c\u306f\u5b9f\u969b\u306b\u306f<i>\/var\/lib\/docker\/container<\/i>\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u5185\u306b\u3042\u308b\u30b3\u30f3\u30c6\u30ca\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u3078\u306e\u30b7\u30f3\u30dc\u30ea\u30c3\u30af\u30ea\u30f3\u30af\u3067\u3059\u3002<\/p>\n<p>kubelet\u306f\u3001<i>\/var\/log<\/i>\u30c7\u30a3\u30ec\u30af\u30c8\u30ea<span style=\"color:#0000ff\">(3)<\/span>\u5185\u306eHTTP\u30d5\u30a1\u30a4\u30eb\u30b5\u30fc\u30d0\u3092\u64cd\u4f5c\u3059\u308b<i>\/logs\/endpoint<\/i><span style=\"color:#0000ff\">(2)<\/span>\u3092\u516c\u958b\u3057\u3001\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u3092API\u30b5\u30fc\u30d0\u304b\u3089\u306e\u8981\u6c42\u3067\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/p>\n<p><i>hostPath<\/i>\u3092<i>\/var\/log<\/i>\u306b\u30de\u30a6\u30f3\u30c8\u3057\u305fpod\u3092\u30c7\u30d7\u30ed\u30a4\u3057\u305f\u3089\u3069\u3046\u306a\u308b\u3067\u3057\u3087\u3046\u304b\u3002pod\u306f\u3001\u305d\u306e\u30db\u30b9\u30c8\u4e0a\u306e\u3059\u3079\u3066\u306epod\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u3059\u3002\u305d\u308c\u3060\u3051\u3067\u554f\u984c\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u8aac\u660e\u3092\u7d9a\u3051\u307e\u3059\u3002 0.log\u30d5\u30a1\u30a4\u30eb\u3092\u30b7\u30f3\u30dc\u30ea\u30c3\u30af\u30ea\u30f3\u30af\u306b\u7f6e\u304d\u63db\u3048\u305f\u3068\u3057\u305f\u3089\u3069\u3046\u306a\u308b\u3067\u3057\u3087\u3046\u304b\u3002\u305f\u3068\u3048\u3070<i>\/etc\/shadow<\/i>\u3092\u5bfe\u8c61\u306b\u3057\u3066\u307f\u305f\u3089\u3069\u3046\u306a\u308b\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n<p>\u2502<br \/>\n\u251c\u2500\u2500 var<br \/>\n\u2502 \u251c\u2500\u2500 log<br \/>\n\u2502 \u2502 \u251c\u2500\u2500 pods<br \/>\n\u2502 \u2502 \u2502 \u251c\u2500\u2500 default_mypod_e7869b14-abca-11e8-9888-42010a8e020e<br \/>\n\u2502 \u2502 \u2502 \u2502 \u251c\u2500\u2500 mypod<br \/>\n\u2502 \u2502 \u2502 \u2502 \u2502 \u251c\u2500\u2500 0.log -> \/etc\/shadow<br \/>\n\u2502 \u2502 \u2502 \u2502 \u2502 \u2502<\/p>\n<p>\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u30de\u30b7\u30f3\u4e0a\u3067<i>kubectl logs<\/i>\u3092\u4f7f\u3063\u3066\u30ed\u30b0\u53d6\u5f97\u3092\u8a66\u307f\u307e\u3059\u3002<\/p>\n<p><span style=\"background-color:#000000\"><br \/>\n<span style=\"color:#ffffff\"><br \/>\n$ kubectl logs mypod<br \/>\nfailed to get parse function: unsupported log format: \"root:*:18033:0:99999:7:::\\n\"<br \/>\n<\/span><br \/>\n<\/span><\/p>\n<p>kubelet\u306f\u30b7\u30f3\u30dc\u30ea\u30c3\u30af\u30ea\u30f3\u30af\u3092\u305f\u3069\u308a\u3001\u305d\u308c\u304c\u6307\u3057\u3066\u3044\u308b\u30d5\u30a1\u30a4\u30eb(\u30ce\u30fc\u30c9\u4e0a\u306e\u4efb\u610f\u306e\u30d5\u30a1\u30a4\u30eb)\u306e\u5185\u5bb9\u3092\u8aad\u307f\u53d6\u308a\u307e\u3059\u3002<\/p>\n<p>kubectl\u306fjson\u5f62\u5f0f\u3092\u60f3\u5b9a\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u6700\u521d\u306e\u884c\u306e\u5f8c\u3067\u5931\u6557\u3057\u307e\u3057\u305f\u304c\u3001<span style=\"background-color:#f5f5f5\">\u2013-tail=-&lt;line_number&gt;<\/span>\u30d5\u30e9\u30b0\u3092\u6e21\u3059\u3053\u3068\u3067\u3001\u30b7\u30e3\u30c9\u30a6\u30d5\u30a1\u30a4\u30eb\u306e\u7279\u5b9a\u306e\u884c\u3092\u7c21\u5358\u306b\u8aad\u307f\u53d6\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n<p>\u30b7\u30f3\u30dc\u30ea\u30c3\u30af\u30ea\u30f3\u30af\u306fkubelet\u306b\u3088\u3063\u3066\u8ffd\u8de1\u53ef\u80fd\u3068\u306a\u308b\u305f\u3081\u3001pod\u5185\u306b\u30b7\u30f3\u30dc\u30ea\u30c3\u30af\u30ea\u30f3\u30af\u3092\u4f5c\u6210\u3059\u308b\u3068\u30ce\u30fc\u30c9\u4e0a\u306e\u4efb\u610f\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u53d6\u308b\u305f\u3081\u306ekubelet\u306eroot\u6a29\u9650\u3092\u5229\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3>\u4fb5\u5165<\/h3>\n<p>\u8aac\u660e\u3092\u7d9a\u3051\u307e\u3059\u3002Kubernetes\u3067pod\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001service account\u306etoken\u304c\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3055\u308c\u308b\u306e\u3067\u3001service account\u304c\u30ed\u30b0\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u8a31\u53ef\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001kubelet\u306b\u76f4\u63a5\u30a2\u30af\u30bb\u30b9\u3057\u3066\u30ce\u30fc\u30c9\u4e0a\u3067root\u306b\u6607\u683c\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u653b\u6483\u30d9\u30af\u30c8\u30eb\u3092\u5b9f\u8a3c\u3059\u308b\u305f\u3081\u306b\u691c\u8a3c\u30ea\u30b9\u30c8\u3092\u4f5c\u6210\u3057\u307e\u3057\u305f\u3002<\/p>\n<ul>\n<li><i>\/var\/log<\/i> \u3078\u306e\u30de\u30a6\u30f3\u30c8\u30dd\u30a4\u30f3\u30c8\u3092\u6301\u3064pod\u3092\u30c7\u30d7\u30ed\u30a4\u3059\u308b\n<li>\u30db\u30b9\u30c8\u4e0a\u306eroot\u30d5\u30a9\u30eb\u30c0\u3078\u306e\u30b7\u30f3\u30dc\u30ea\u30c3\u30af\u30ea\u30f3\u30af\u3092\u4f5c\u6210\u3059\u308b\n<li>\u30db\u30b9\u30c8\u4e0a\u306e\u30e6\u30fc\u30b6\u306eSSH\u79d8\u5bc6\u9375\u3092\u8aad\u307f\u53d6\u308b\n<\/ul>\n<p>\u6b21\u306e\u30d3\u30c7\u30aa\u306f\u3001\u4e00\u90e8pod\u5185\u3067\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3057\u305f\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p><span style=\"background-color:#f5f5f5\">lsh==ls(\u30db\u30b9\u30c8\u4e0a)<\/span><br \/>\n<span style=\"background-color:#f5f5f5\">cath==cat(\u30db\u30b9\u30c8\u4e0a)<\/span><\/p>\n<p><script id=\"asciicast-sI1jTa7N5W2lkwRJGtxEXp96D\" src=\"https:\/\/asciinema.org\/a\/sI1jTa7N5W2lkwRJGtxEXp96D.js\" async data-speed=\"2\"><\/script><\/p>\n<p>\u3053\u306e\u691c\u8a3c\u3067\u4f7f\u7528\u3057\u3066\u3044\u308b\u3059\u3079\u3066\u306e\u30d5\u30a1\u30a4\u30eb\u306f\u3001\u3053\u306e<a href=\"https:\/\/github.com\/danielsagi\/kube-pod-escape\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">GitHub<\/a>\u30ea\u30dd\u30b8\u30c8\u30ea\u306b\u3042\u308a\u307e\u3059\u3002\u3055\u3089\u306b\u540c\u3058\u30ea\u30dd\u30b8\u30c8\u30ea\u306b\u306f\u3001\u30db\u30b9\u30c8\u4e0a\u3067\u79d8\u5bc6\u9375\u3068Kubernetes\u306eservice account\u306etoken\u3092\u81ea\u52d5\u7684\u306b\u62bd\u51fa\u3059\u308b\u30b9\u30af\u30ea\u30d7\u30c8\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h2>\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3092\u30de\u30a6\u30f3\u30c8\u3059\u308b\u3068\u6642\u306b\u30ea\u30b9\u30af\u3068\u306a\u308b<\/h2>\n<p>\u3053\u308c\u306fKubernetes\u306e\u8106\u5f31\u6027\u3067\u3057\u3087\u3046\u304b\u3001\u305d\u308c\u3068\u3082\u5358\u306b\u60aa\u3044\u8a2d\u5b9a\u4f8b\u306a\u306e\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n<p>\u66f8\u304d\u8fbc\u307f\u53ef\u80fd\u306a<i>hostPath<\/i>\u3092\u6301\u3064pod\u3092<i>\/var\/log<\/i>\u306b\u30c7\u30d7\u30ed\u30a4\u3059\u308b\u3053\u3068\u306f\u3081\u3063\u305f\u306b\u3042\u308a\u307e\u305b\u3093(\u6a5f\u5bc6\u6027\u306e\u9ad8\u3044\u30db\u30b9\u30c8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3092pod\u306b\u30de\u30a6\u30f3\u30c8\u3059\u308b\u3053\u3068\u3092\u60aa\u7528\u3059\u308b<a href=\"https:\/\/www.youtube.com\/watch?v=ltrV-Qmh3oY\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">\u4ed6\u306e\u65b9\u6cd5<\/a>\u304c\u3042\u308a\u307e\u3059)\u3002\u3057\u304b\u3057\u3001<i>\/var\/log<\/i>\u306e\u30de\u30a6\u30f3\u30c8\u304c\u30ea\u30b9\u30af\u304c\u9ad8\u3044\u3053\u3068\u3067\u3042\u308b\u3053\u3068\u3092\u77e5\u3063\u3066\u3044\u305f\u3068\u3057\u3066\u3082\u3001\u304a\u305d\u3089\u304f\u305d\u308c\u304c\u7c21\u5358\u306b\u30ce\u30fc\u30c9\u306e\u4e57\u3063\u53d6\u308a\u3078\u3068\u3064\u306a\u304c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3068\u306f\u601d\u308f\u306a\u304b\u3063\u305f\u3067\u3057\u3087\u3046\u3002<\/p>\n<p>\u3053\u306e\u8a18\u4e8b\u3092\u516c\u958b\u3059\u308b\u524d\u306b\u3001Aqua\u793e\u306eKubernetes\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30c1\u30fc\u30e0\u306b\u3053\u306e\u554f\u984c\u3092\u63d0\u8d77\u3057\u3001\u5f7c\u3089\u304c\u305d\u308c\u3092\u8106\u5f31\u6027\u3068\u898b\u306a\u3057\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3057\u307e\u3057\u305f\u3002\u5f7c\u3089\u306f\u305d\u308c\u304c\u66f8\u304d\u8fbc\u307f\u53ef\u80fd\u306a\u30db\u30b9\u30c8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3092\u30de\u30a6\u30f3\u30c8\u3057\u305f\u3053\u3068\u306b\u3088\u308b\u5358\u306a\u308b\u4e0d\u5e78\u306a\u7d50\u679c\u3067\u3042\u308b\u3068\u7d50\u8ad6\u4ed8\u3051\u307e\u3057\u305f\u3002\u3053\u306e\u30ea\u30b9\u30af\u306f<a href=\"https:\/\/kubernetes.io\/docs\/concepts\/policy\/pod-security-policy\/#volumes-and-file-systems\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">\u6587\u66f8\u5316<\/a>\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3068\u306f\u3044\u3048\u3001\u3053\u308c\u306f\u60aa\u7528\u3059\u308b\u306e\u304c\u6bd4\u8f03\u7684\u7c21\u5358\u3067\u3059\u3002\u73fe\u5728\u3053\u306e\u30de\u30a6\u30f3\u30c8\u3092\u4f7f\u7528\u3059\u308b\u591a\u304f\u306e<a href=\"https:\/\/github.com\/search?q=%22hostPath%3A+path%3A+%2Fvar%2Flog%22+in%3Afile&type=Code\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">\u30d7\u30ed\u30b8\u30a7\u30af\u30c8<\/a>\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u3044\u305a\u308c\u304b\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u30c7\u30d7\u30ed\u30a4\u3057\u305fpod\u304c\u30db\u30b9\u30c8\u306e\u4e57\u3063\u53d6\u308a\u306b\u3064\u306a\u304c\u308b\u30ea\u30b9\u30af\u304c\u3042\u308b\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>\u3053\u306e\u30e1\u30bd\u30c3\u30c9\u306fKubernetes 1.15\u30681.13\u3067\u30c6\u30b9\u30c8\u3055\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u4ed6\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u3082\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h2>\u7de9\u548c\u7b56<\/h2>\n<p>\u3053\u306e\u65b9\u6cd5\u306f\u3001pod\u304croot\u3068\u3057\u3066\u5b9f\u884c\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u306b\u306e\u307f\u53ef\u80fd\u3067\u3059\u3002\u4e00\u822c\u306b\u3001\u3053\u308c\u306f<a href=\"https:\/\/kubernetes.io\/blog\/2018\/07\/18\/11-ways-not-to-get-hacked\/#8-run-containers-as-a-non-root-user\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">\u907f\u3051\u308b\u3079\u304d<\/a>\u3067\u3042\u308a\u3001\u30b3\u30f3\u30c6\u30ca\u304croot\u3067\u5b9f\u884c\u3055\u308c\u306a\u3044\u3088\u3046\u306b\u3001\u307e\u305f\u306froot\u304c\u5fc5\u8981\u3068\u3055\u308c\u308b\u7279\u5b9a\u306e\u30b0\u30eb\u30fc\u30d7\u306e\u30a4\u30e1\u30fc\u30b8\u306e\u307f\u3092\u30db\u30ef\u30a4\u30c8\u30ea\u30b9\u30c8\u5316\u3059\u308b\u305f\u3081\u306bAqua CSP\u3067\u30dd\u30ea\u30b7\u30fc\u3092\u8a2d\u5b9a\u3059\u308b\u306e\u306f\u7c21\u5358\u3067\u3059\u3002<\/p>\n<p>\u3082\u30461\u3064\u306e\u5bfe\u5fdc\u7b56\u306f\u3001\u66f8\u304d\u8fbc\u307f\u53ef\u80fd\u306a<i>hostPath<\/i>\u3092\u6301\u3064pod\u3092<i>\/var\/log<\/i>\u306b\u5c55\u958b\u3057\u306a\u3044\u3053\u3068\u3067\u3059\u3002\u3053\u308c\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u8a2d\u5b9a\u3084\u4e00\u822c\u7684\u306a\u65b9\u6cd5\u3067\u306f\u306a\u3044\u305f\u3081\u3001\u614e\u91cd\u306b\u5b9a\u7fa9\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u305d\u308c\u3067\u3082\u53ef\u80fd\u6027\u306f\u3042\u308a\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u3069\u3046\u3084\u3063\u3066\u305d\u308c\u3092\u30c1\u30a7\u30c3\u30af\u3057\u307e\u3059\u304b\uff1f<\/p>\n<p>Kubernetes\u7528\u306e\u30aa\u30fc\u30d7\u30f3\u30bd\u30fc\u30b9\u8ca0\u8377\u30c6\u30b9\u30c8\u30c4\u30fc\u30eb\u3067\u3042\u308b<a href=\"https:\/\/kube-hunter.aquasec.com\/\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">kube-hunter<\/a>\u3067pod\u304c\u3053\u306e\u30de\u30a6\u30f3\u30c8\u3092\u5b9f\u884c\u3057\u3066\u3044\u308b\u304b\u5426\u304b\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>Aqua\u3092\u5229\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u3001RuntimePolicies(Aqua\u306e\u6a5f\u80fd\u306e\u4e00\u3064)\u3092\u4f7f\u7528\u3057\u3066<i>\/var\/log<\/i>\u30d1\u30b9\u304b\u3089\u30dc\u30ea\u30e5\u30fc\u30e0\u30de\u30a6\u30f3\u30c8\u3092\u30d6\u30e9\u30c3\u30af\u30ea\u30b9\u30c8\u306b\u767b\u9332\u3059\u308b\u3053\u3068\u3067\u3001\u3053\u306e\u7a2e\u306e\u30ea\u30b9\u30af\u3092\u9632\u3050\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n<div style=\"text-align: center;\"><img decoding=\"async\" src=\"https:\/\/blog.aquasec.com\/hs-fs\/hubfs\/Blog\/08-01%20-%20Kubernetes%20Escape\/Aqua.jpg?width=1016&name=Aqua.jpg\" alt=\"\" \/><\/div>\n<h2>\u307e\u3068\u3081<\/h2>\n<p>Kubernetes\u306f\u3001\u8907\u96d1\u306a\u30b7\u30b9\u30c6\u30e0\u3067\u3042\u308a\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30ea\u30b9\u30af\u304c\u4e00\u822c\u7684\u306a\u30e6\u30fc\u30b6\u3060\u3051\u3067\u306a\u304f\u3001\u5c02\u9580\u5bb6\u3067\u3055\u3048\u3082\u5e38\u306b\u660e\u78ba\u3067\u3042\u308b\u3068\u306f\u8a00\u3048\u307e\u305b\u3093\u3002\u7279\u5b9a\u306e\u72b6\u6cc1\u4e0b\u3067\u306f\u3001\u6f5c\u5728\u7684\u306b\u60aa\u7528\u306b\u3064\u306a\u304c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3053\u3068\u3092\u793a\u3057\u307e\u3057\u305f\u3002\u307b\u3068\u3093\u3069\u306e\u5834\u5408\u3001\u3053\u308c\u306f\u4e0d\u53ef\u80fd\u3067\u3059\u304c\u3001Kubernetes\u3092\u5229\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u30e6\u30fc\u30b6\u306f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5168\u4f53\u306e\u72b6\u614b\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u591a\u304f\u306e\u3053\u3068\u3092\u5b9f\u884c\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u3053\u3068\u3092\u7406\u89e3\u3057\u3001\u305d\u306e\u3088\u3046\u306a\u9593\u9055\u3044\u3092\u9632\u3050\u305f\u3081\u306b\u9069\u5207\u306a\u7ba1\u7406\u7b56\u3092\u8b1b\u3058\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\t\t<!--HubSpot Call-to-Action Code -->\n\t\t<span class=\"hs-cta-wrapper\" id=\"hs-cta-wrapper-3a13195e-48f8-474a-ac0e-d21ac0a01291\">\n\t\t<span class=\"hs-cta-node hs-cta-3a13195e-48f8-474a-ac0e-d21ac0a01291\" id=\"3a13195e-48f8-474a-ac0e-d21ac0a01291\">\n\t\t<!--[if lte IE 8]>\n\t\t<div id=\"hs-cta-ie-element\"><\/div>\n\t\t<![endif]-->\n\t\t<a href=\"https:\/\/cta-redirect.hubspot.com\/cta\/redirect\/6168413\/3a13195e-48f8-474a-ac0e-d21ac0a01291\" >\n\t\t<img decoding=\"async\" class=\"hs-cta-img\" id=\"hs-cta-img-3a13195e-48f8-474a-ac0e-d21ac0a01291\" style=\"border-width:0px;\" src=\"https:\/\/no-cache.hubspot.com\/cta\/default\/6168413\/3a13195e-48f8-474a-ac0e-d21ac0a01291.png\"  alt=\"New call-to-action\"\/>\n\t\t<\/a>\n\t\t<\/span>\n\t\t<script charset=\"utf-8\" src=\"\/\/js.hubspot.com\/cta\/current.js\"><\/script>\n\t\t<script>\n\t\thbspt.cta.load(6168413, '3a13195e-48f8-474a-ac0e-d21ac0a01291', {});\n\t\t<\/script>\n\t\t<\/span>\n\t\t<!-- end HubSpot Call-to-Action Code -->\n\t\t\n","protected":false},"excerpt":{"rendered":"<p>\u672c\u30d6\u30ed\u30b0\u306f\u300cAqua Security\u300d\u793e\u306e\u6280\u8853\u30d6\u30ed\u30b0\u30672019\u5e748\u67081\u65e5\u306b\u516c\u958b\u3055\u308c\u305f\u300cKubernetes Pod Escape Using Log Mounts\u300d\u306e\u65e5\u672c\u8a9e\u7ffb\u8a33\u3067\u3059\u3002 \u30ed\u30b0\u30de\u30a6\u30f3\u30c8\u3092\u4f7f\u7528\u3057\u305f\u4fb5\u5165 Kub [&#8230;]<\/p>\n","protected":false},"author":56,"featured_media":29313,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","footnotes":""},"categories":[176,122],"tags":[174,152,154,68,52,123,112],"class_list":["post-29281","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-aquasecurity","category-kubernetes","tag-aqua","tag-aquasecurity","tag-container","tag-devops","tag-docker","tag-k8s","tag-kubernetes"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Kubernetes \u30ed\u30b0\u30de\u30a6\u30f3\u30c8\u306e\u30ea\u30b9\u30af #AquaSecurity #DevSecOps #Container #Security #Kubernetes - Tech Blog\uff5c\u30af\u30ea\u30a8\u30fc\u30b7\u30e7\u30f3\u30e9\u30a4\u30f3<\/title>\n<meta name=\"description\" content=\"AquaSecurity, Kubernetes |\u672c\u30d6\u30ed\u30b0\u306f\u300cAqua Security\u300d\u793e\u306e\u6280\u8853\u30d6\u30ed\u30b0\u30672019\u5e748\u67081\u65e5\u306b\u516c\u958b\u3055\u308c\u305f\u300cKubernetes Pod Escape Using Log\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.creationline.com\/tech-blog\/cloudnative\/aquasecurity\/29281\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Kubernetes \u30ed\u30b0\u30de\u30a6\u30f3\u30c8\u306e\u30ea\u30b9\u30af #AquaSecurity #DevSecOps #Container #Security #Kubernetes - Tech Blog\uff5c\u30af\u30ea\u30a8\u30fc\u30b7\u30e7\u30f3\u30e9\u30a4\u30f3\" \/>\n<meta property=\"og:description\" content=\"AquaSecurity, Kubernetes |\u672c\u30d6\u30ed\u30b0\u306f\u300cAqua Security\u300d\u793e\u306e\u6280\u8853\u30d6\u30ed\u30b0\u30672019\u5e748\u67081\u65e5\u306b\u516c\u958b\u3055\u308c\u305f\u300cKubernetes Pod Escape Using Log\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.creationline.com\/tech-blog\/cloudnative\/aquasecurity\/29281\" \/>\n<meta property=\"og:site_name\" content=\"Tech Blog\uff5c\u30af\u30ea\u30a8\u30fc\u30b7\u30e7\u30f3\u30e9\u30a4\u30f3\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/creationline\" \/>\n<meta property=\"article:published_time\" content=\"2019-08-05T02:30:39+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2019-09-11T09:00:46+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.creationline.com\/tech-blog\/cms_x3GWkuX\/wp-content\/uploads\/2019\/08\/Kubernetes-Pod-Escape.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"650\" \/>\n\t<meta property=\"og:image:height\" content=\"315\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Kent Magruder\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@creationline\" \/>\n<meta name=\"twitter:site\" content=\"@creationline\" \/>\n<meta name=\"twitter:label1\" content=\"\u57f7\u7b46\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"Kent Magruder\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u63a8\u5b9a\u8aad\u307f\u53d6\u308a\u6642\u9593\" \/>\n\t<meta name=\"twitter:data2\" content=\"1\u5206\" \/>\n<script type=\"application\/ld+json\" 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